Competitive PC Gaming & Error Lexicon

Windows OS mechanism that restarts the graphics driver when the GPU hangs for more than 2 seconds.

Timeout Detection and Recovery (TDR) is a Windows subsystem feature that monitors the GPU scheduler. If the graphics card does not respond to a DirectX draw call within 2 seconds (default TdrDelay threshold), Windows assumes hardware deadlock, forcibly terminates the 3D application, and attempts a silent driver reset. Extending TdrDelay to 8-10 seconds prevents premature game crashes during heavy scene rendering.

Security software executing at the highest Windows privilege level with direct access to hardware memory.

In x86 CPU architecture, Ring 0 represents the highest privilege level where the operating system kernel runs. Kernel anti-cheat systems (Riot Vanguard, Easy Anti-Cheat, BattlEye, Ricochet) load signed .sys drivers into Ring 0 to prevent malicious software from reading or modifying game memory from userland (Ring 3). This level of security strictly requires BIOS TPM 2.0 and UEFI Secure Boot on Windows 11.

The average framerate of the slowest 1% of frames, defining how smooth a game actually feels.

Average FPS only measures total frames delivered across a second, masking momentary micro-stutters. If a game runs at 240 FPS but has 1% lows of 45 FPS, the player will feel jarring hitching during gunfights. 1% lows are dictated by CPU cache hierarchy, RAM latency (sub-timings), and background thread scheduling.

Valve network protocol that timestamps user input between traditional server ticks.

In traditional 64-tick or 128-tick servers, player inputs (shooting, jumping) were calculated only at fixed tick boundaries. In Counter-Strike 2, sub-tick records the precise millisecond an action occurred between ticks, sending an exact timestamp so the server reconciles bullet trajectory at the exact instant the left mouse button was clicked.

Pre-compiled DirectX 12 graphics states stored on disk to eliminate in-game compilation stutter.

Under DirectX 11, the graphics driver compiled shaders on the fly as assets entered the viewport. In DirectX 12 and Vulkan, the game engine must explicitly manage PSO caches. If a game launches without complete PSO compilation, compiling complex shaders during gameplay causes massive frame drops. Corrupted PSO caches cause immediate crashes to desktop on startup.

Dynamic keyboard key reset technology using magnetic Hall Effect sensors.

Traditional mechanical keyboard switches must travel past a fixed physical reset leaf (typically 1.5mm - 2.0mm) before a key can be pressed again. Hall Effect switches use magnetic flux sensors to register key position down to 0.1mm. Rapid Trigger dynamically resets actuation the instant your finger begins lifting, allowing instantaneous counter-strafing in CS2 and Valorant.

Microsecond power surges on modern GPUs exceeding nominal rated TDP by up to 200%.

Modern high-performance graphics architectures (RTX 4090, 7900 XTX) can draw up to 2x their rated power for a few milliseconds when transitioning from idle to maximum rasterization load. Older ATX 2.x power supplies frequently trip their Over-Current Protection (OCP), causing sudden black screens and PC reboots. ATX 3.0 PSUs are rated to withstand 200% transient excursions.

Console variable that scales horizontal mouse sensitivity on 4:3 stretched resolutions.

When stretching a 4:3 aspect ratio (e.g. 1280x960) onto a 16:9 monitor, horizontal player models appear 33.3% wider, but the mouse also travels horizontally 33.3% faster visually. Changing m_yaw from 0.022 to 0.0165 mathematically restores true 1:1 circular mouse travel, preserving identical vertical and horizontal hand displacement.

The variance between a mouse's advertised DPI setting and its actual physical tracking counts.

Manufacturing tolerances in optical sensor lens height, PCB thickness, skate thickness, and mousepad weave cause real-world DPI to deviate from nominal values. A mouse configured to 800 DPI may physically output 830 DPI (+3.75% deviation). Measuring CPI variance enables gamers to apply an exact mathematical sensitivity correction multiplier in-game.

Visually lossless display bandwidth compression enabling high refresh rates at high resolutions.

DisplayPort 1.4 has a physical uncompressed bandwidth ceiling of 32.4 Gbps. Running 4K at 144Hz or 1440p at 360Hz with 10-bit HDR exceeds this limit. DSC compresses video frames on the GPU and decompresses them inside the monitor scaler in real time. Poor quality DisplayPort cables or corrupted driver handshakes cause DSC handshaking blackouts when Alt-Tabbing.

Direct Windows audio stream bypassing the shared system sound mixer.

By default, Windows routes all application sounds through the shared audio mixer (WASAPI Shared), adding 20ms - 40ms of latency and resampling audio streams. WASAPI Exclusive mode grants the game client direct unhindered access to the sound card buffer, achieving sub-10ms output audio response essential for immediate footstep reaction.

Windows hypervisor security isolation that protects kernel memory from injection.

Hypervisor-Enforced Code Integrity (HVCI) and Virtualization-Based Security (VBS) run critical Windows kernel processes inside an isolated virtual environment. Modern anti-cheat systems require VBS to prevent rootkits. However, on older CPUs, VBS can impose a 3% - 7% gaming performance penalty due to hypervisor context switching.